When i turn on my macpro only doing sound and the screen is in blank dark.what i need do?.please
Can you send a photo via your phone ? Something to makeit clear ?
Reset SMC. http://support.apple.com/kb/HT3964
Choose the method for:
"Resetting SMC on portables with a battery you should not remove on your own".
If this does not help, you have to take the computer to the Apple store.
For more on this:
Retrieving data ...